If you haven't heard of it yet, I suggest that you look at Albert Ellis's Rational Emotive Behavior Therapy (REBT), and start training yourself to aggressively fight any demons that might be haunting you. I highly recommend Ellis's book, "A Guide to Rational Living", which will train you in challenging your own self-defeating thoughts. Note that I don't mean this as a cure-all, but merely as one of the tools you (or anyone else!) should have in their life's toolbox.
The fundamental premise of REBT is that it's not the events in our lives themselves, but our beliefs about the events that upset our emotional state. Hence to change our negative emotions, we must attack through reason the beliefs that promote negative emotional states. Here's is a useful summary of the REBT approach: https://rebtnetwork.org/whatis.html .
What I love most about REBT is that it trains us to be our own therapist. That is quite empowering and liberating!